Role: Thomas SchaefferForensic psychologist who possess a deep understanding of serial killers. He finds himself deeply connected to each case, but often through the killer, which proves to be a hazardous undertaking.

James on his character:Thomas is somebody who feels that he really does have a skill, which he dislikes intensely about himself, but it's a skill which he believes can make the world a better place. He has this ability to completely empathize with the serial killer. Obviously trying to manage that along with having a family at the same time is not without complications.

Plot: A remake of the Danish TV series Den som dræber, based on the novels by Elsebeth Egholm. Centers on a female police detective and a forensic psychiatrist on the hunt for serial killers. They both have a personal demon that propels and hinders their success.

Episode List:

Episode 1.01 - Pilot In the premiere episode, newly promoted homicide detective, Catherine Jensen, tracks down a serial killer while attempting to come to terms with her past. Jensen enlists the help of Thomas Schaeffer, a forensic psychologist, to help her get into the minds of serial killers, while luring Schaeffer into her own personal investigation.

Episode 1.02 - The Way Home While Catherine waits to be cleared for duty by the D.A.'s office, and Thomas secretly investigates Catherine's past, a brutal murder and a John Doe suicide are discovered.

Episode 1.03 - Rocking the Boat As the killing escalates, Catherine uses the investigation of the two victims to push Thomas to research her allegations further.

Episode 1.04 - Sunday Catherine is forced go to Howard for more information on the case, while Thomas has a real conversation with John about getting inside the minds of murderers. Using Thomas' narrowing profile, Catherine closes in on the killer.

Episode 1.05 - Souvenirs Thomas' decision to stop working on active cases causes Catherine to investigate his past, leading her to an unexpected family history. Catherine takes Thomas to the scene of her childhood trauma where she finally reveals all the details that still haunt her.

Episode 1.06 - Always AfterCatherine throws herself into a new case; Thomas ventures too deeply into the mind of a killer.

- Producers Glen Morgan and Brian Grazier wanted to film Those Who Kill in Vancouver but were told to shoot in Pennsylvania instead because of the state’s superior tax breaks.

- The series premiered on A&E TV but was moved to Lifetime Movies Network after 2 episodes.

- At a BBC America party in July 2014 Glen Morgan explained what he planned to have happen at the start of season two (Ep. 10 ended with a cliffhanger: Catherine ran into the house with a gun followed by Thomas. Shots rang out). Glen Morgan said: "Nobody died. The young boy was staying at the house that night and he was accidentally injured in the shooting. The judge knew that they were onto him and they knew that he knew that they were onto him so for several episodes it would have been him messing with them by trying to destroy their lives."

Film Locations- Pittsburgh, Pennsylvania (USA)

Quotes

Brian Grazer (Producer): I know that the serial killer aspect is a very big component to it, but I don’t feel like that’s the driving force. [...] We're trying to talk about the ramifications of violence, of what the victims have to suffer, and it’s just not done when you lock the guy away or he happens to die.

Reviews:

Sevigny and D'Arcy led the pack because their characters were the largest focus in the series premiere and gave strong enough performances to make them unforgettable.[...] D'Arcy's performance as the quietly dangerous Schaeffer made him seem interesting and a little disturbing at the same time. He always managed to bring out the dark side in most of his characters by expressing an ulterior motive in his eyes and with an extra gleam in his eyes for reasons only known to the character --- Heather Dekin, examiner.com

To say that Thomas Schaeffer is a method profiler is an understatement. A scene where he is poised to free a trapped women but delays the rescue to hover trembling above her, his eyelids fluttering, will leave you agog --- Nancy Dewolf Smith, The Wall Street Journal online

Catherine teams up with criminologist Thomas Schaeffer, played by James D’Arcy, and the scenes between Sevigny and D’Arcy are the sole highlights of the pilot. The two have a surprisingly crackling chemistry, one that makes the viewer wish Schaeffer weren’t married to a wife --- Todd VanDerWerff, AVClub.com

The man she enlists to help her track a killer is equally cerebral and weird. Thomas Schaeffer, played with controlled chaos and nervous stares by James D’Arcy, is an insightful and invested forensic psychologist... The marginal success of the pilot has everything to do with Sevigny and D’Arcy --- Anthony Marcusa, TV Rage

And, in fact, Sevigny and D’Arcy are the best part of Those Who Kill. Sevigny plays Jensen as offbeat and dark and twisty in a way only she can. D’Arcy plays Schaeffer as mildly tortured (for reasons we don’t quite know yet). And D’Arcy has this kind of wonderfully creepy Anthony Perkins vibe that serves his character well. The two have good chemistry and are interesting to watch together --- Taylor McDaniel, tvandfilmreview.com